Furnace repair

Common problems we fix

Furnaces commonly run into no heat, uneven heating, ignition failures, or unusual noises, often from a faulty igniter, blower, or thermostat.

We diagnose the real cause first, including on multi-zone systems.

Common signs and causes

• If your furnace is running but producing little or no heat, the problem is often a faulty ignitor, a malfunctioning gas valve, dirty burners, or a tripped limit switch.
• If your furnace won’t start at all, the issue may be as simple as a tripped circuit breaker or a thermostat misconfiguration, or as complex as a failed control board or a broken ignition system.
• Call us for no heat, uneven heating, ignition issues, strange noises or a furnace that has become less efficient.
• A furnace that blows cold air, short cycles or will not light at all usually has a problem in ignition, gas supply, airflow or the controls.
• Error lights on the control board often help narrow it down.

Other furnace problems we fix

• Short cycling. It’s typically caused by a clogged air filter restricting airflow, an overheating heat exchanger, a faulty flame sensor, or a malfunctioning thermostat.
• Flame sensor. A dirty or faulty flame sensor will cause your furnace to light and then shut off within seconds, as the sensor can’t confirm the burner is producing a stable flame.
• Ignitor. On modern furnaces, a failed hot surface ignitor is one of the most frequent causes of a furnace not lighting.
• Blower motor. A worn-out or failed blower motor results in weak or no airflow from your vents, even when the furnace is running.
• Strange noises. Banging may indicate delayed ignition or a loose component; squealing often points to a worn blower belt or motor bearing; rattling can signal loose panels or ductwork.

If you suspect carbon monoxide or a gas problem

If you notice soot around the furnace, a yellow or flickering burner flame, or unexplained illness symptoms in your household, get everyone outside and call 911 or your gas utility. Call us once everyone is safe.

After the repair

Once the repair is complete, we run a full system test - including a safety check for carbon monoxide and gas leaks - to confirm your furnace is operating correctly and safely before we leave your home.